22 March 2018 Numerical model for an epoxy beam reinforced with superelastic shape memory alloy wires
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Abstract
We present a numerical solution for a smart composite beam consisting of an epoxy matrix reinforced with unidirectional superelastic shape memory alloy (SMA) fibers with uniform circular cross section. The beam is loaded by a tip load, which is then removed resulting in shape recovery due to superelasticity of the SMA wires. The analysis is carried out considering a representative volume element (RVE) of the beam consisting of one SMA wire embedded in epoxy. The analytical model is developed for a superelastic SMA/epoxy composite beam subjected to a complete loading cycle in bending. Using the proposed model, the moment-curvature profile, martensite volume fraction variation, and axial stress are determined. The results are validated against three-dimensional finite element analysis (3D FEA) for the same conditions. The proposed work is a contribution toward better understanding of the bending behavior of superelastic SMA-reinforced composites.
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N. V. Viet, W. Zaki, R. Umer, "Numerical model for an epoxy beam reinforced with superelastic shape memory alloy wires", Proc. SPIE 10596, Behavior and Mechanics of Multifunctional Materials and Composites XII, 105961Y (22 March 2018); doi: 10.1117/12.2296383; https://doi.org/10.1117/12.2296383
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